I have been having injections of Avastin, and Vabysmo for wet Macular degneration, since 2018. I get the injection every 5 to 6 weeks. I have only had a blood shot eye twice. I feel like both of those time I moved my eye just a fraction, and that is what cause the blood shot issue. And both times it took at least 2 weeks for it to clear up. My doctor has a very calming mannerism, and most times I am very relaxed, but I have been nervous a few times, and that may cause me to move my eye, during the procedure. I know it is very important not to move.